There are actually a couple of options I just stumbled into. I have some parts on order, but nothing installed with this, YET!
There is a company called Threshold Racing that makes a Remote Piggy Back Ressevior, and then you have the usual suspects like RC4WD (both just a piggy back or the whole shocklook at VERSION 2), Golden Horizon (just a piggy back), etc. These however, use the stock shaft body and go from there. If you have an RTR (purple monster) like myself, it was HIGHLY recommended to move up to the SS shock kit (shaft, piston choices, seals, etc), and if you have the SS and are having issues with bent shafts etc, then it was suggested to move up to another brand...have to look it up...
Here is a link to a Baja Owner with a list of upgrades HE suggests...worth a look. I enjoyed it.
http://www.formulabaja.com